Industry News

Kuraray Develops Bio-Based, High-Barrier, Recyclable Granulate for Paper Coating

by | Apr 12, 2023

Kuraray, the global speciality chemicals company headquartered in Japan, has launched a new grade of its sustainable, high-performance barrier material PLANTIC™. As a plant-based granulate developed specifically for extrusion coating, PLANTIC™ EP is suitable for the development of sustainable gas and aroma-barrier solutions for paper, cardboard, and traditional film substrates. A recent certificate awarded by Western Michigan University (WMU) confirms that this new material is repulpable and recyclable. It can therefore be used as the basis for sustainable barrier pouch and carton formats for brand owners and converters. PLANTIC™ EP gives the market a high-barrier material that is fully recoverable and recyclable in the US paper stream.

“Companies have recognised the importance of packaging that maintains product integrity and shelf life, while consumers don’t want to buy products that add to landfills,” says Tom Black of Kuraray’s PLANTIC™ unit. 

“We noticed a gap in the market and the need for a sustainable material that could be used to produce pouches and cartons with high barrier properties. It was clear that PLANTIC™ EP could be a game-changer. As well as complementing customers’ and retailers’ dynamic product ranges, PLANTIC™ EP helps them achieve their sustainability goals – thanks to certification from Western Michigan University that it is both repulpable and recyclable, enabling us all to leave behind a better world for our children.”

PLANTIC™ is produced from starch and is one of the world’s most progressive bio-based plastics. It can be used in both recyclable and compostable formats, is made from renewable, plant-based materials, and provides an excellent gas barrier that prolongs the shelf-life of the packaged products. Moreover, it can significantly reduce the environmental impact compared with conventional packaging and enables reuse of materials that could not previously be recycled.

To develop a recyclable, high-barrier pouch, Kuraray applied PLANTIC™ EP to kraft paper using the extrusion coating process with a bonding/heat-sealing layer of polyethylene from Westlake. Flexible pouches and cartons with high barrier properties can be produced using PLANTIC™ EP in combination with multi-layer films. The additional structural layers can be separated, re-used, and, where appropriate, recycled or composted.

“In this collaboration with Kuraray, we used all our application development resources to create a really unique offering,” says Amy Moore, Vice President of Westlake. “We see the benefits of Kuraray’s technology and look forward to working together on further developments as Kuraray commercialises the technology across the bandwidth of market segments and categories.”

Speciality chemicals expert Kuraray recognised brand owners’ need for sustainability-certified packaging. Therefore, it asked WMU to assess the repulpability and recyclability of the PLANTIC™ EP/Westlake pouch made from coated paper. Since PLANTIC™ EP can be completely washed out in the recycling process, WMU certified the recyclability of the PLANTIC™ EP/Westlake pouch in October 2022. 

“WMU certification as confirmation of recyclability is an important first step in securing a How2Recycle label,” says Black. “When developing packaging formats for brand owners, producers want to see that the materials they are using have been vetted by WMU. Certification enables them to apply to How2Recycle for a pre-validation letter, which speeds up the introduction of PLANTIC™ EP-based high-barrier solutions.”

PLANTIC™ EIP is currently available for testing and is already being used commercially by several brands around the world. Specific application scenarios include the production of pouches and cartons for products such as coffee, pet food, dry goods, and so on.

Kuraray is currently assessing the recyclability of this product in European recycling streams. Initial internal test results are now available and are promising.

Press release

Image courtesy of Kuraray

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